<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>

<body>
    <div id="app">
        <!-- v-bind是数据单向绑定 -->
        <input type="text" :value="msg">
        <!-- v-model可以实现数据双向绑定 -->
        <input type="text" v-model:value="username">
        <!-- value可以省略 -->
        <input type="text" v-model="username">
        <h1>username是{{username}}</h1>
    </div>

    <script>
        Vue.config.prodactionTip = false

        const vm = new Vue({
            el: "#app",
            data() {
                return {
                    msg: "hello",
                    username: "laoliu"
                }
            }
        })
    </script>
</body>

</html>